Psa 81:10 I am the LORD thy God, which brought thee out of the land of Egypt: open thy mouth wide, and I will fill it.
A preacher I once knew was preaching away, when suddenly a fly flew right down his throat! He thought a second and then quoted this verse to his people, Open thy mouth wide and I will fill it.
What we have here is an offer from the Lord for those who trust Him. His part is to fill our mouths, ours is to open our mouths, and more so, open them wide. The more open our mouths, the more He can fill us.
He fills us with the right words
He fills us with sustenance
He fills us with His Spirit
He fills us with goodness
He fills us with faith
We limit the Lord's filling by refusing to even open our mouths and, if we do, we don't open them wide enough.
The question is, do we have the faith to open up and let God bless us? Or will we continue to live a life lacking in abundant blessings for failure to open wide?